We turn now to a big consumer alert tonight about a major food recall with millions of Americans firing up -- grills this weekend. California's Foster farms is recalling 170. Chicken products. ABC's Ron Claiborne with the new warning tonight. Today's massive -- recall an effort to prevent the spread of a virulent antibiotic resistant strain of Salmonella. Just the latest recall -- California based Foster farms linked to outbreaks in 2012 -- 2013. That sickened more than 500 people. The newly recalled chicken sold in March and nine western states. And its packaging bears use or freeze by labels ranking from march 16. -- 31. Foster farms says only one illness was definitively traced to its chicken. But -- -- voluntarily expanding the recall to all products packaged in that period. In the -- interest of food safety traces of Salmonella are often found in chicken and washing it can actually spread the bacteria. When this chicken was treated with -- powder simulating bacteria are UV light shows it ended up all around the kitchen and utensils. A window -- a soap dispenser. And the most important thing to remember when your cooking the chicken is that it be cooked at a temperature of at least. A 165. Degrees inside no worries at this -- and they always make sure. Including yourself -- -- don't want any -- good advice this holiday weekend. And Ron Claiborne ABC news New York.

This transcript has been automatically generated and may not be 100% accurate.

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